Method test_cant_get_size

Lib/test/test_shutil.py:3283–3291

(self)

        self.assertEqual(cm.exception.errno, errno.EBADF)

    def test_cant_get_size(self):
        # Emulate a case where src file size cannot be determined.
        # Internally bufsize will be set to a small value and
        # a system call will be called repeatedly.
        with unittest.mock.patch('os.fstat', side_effect=OSError) as m:
            with self.get_files() as (src, dst):
                self.zerocopy_fun(src, dst)
                assert m.called
        self.assertEqual(read_file(TESTFN2, binary=True), self.FILEDATA)

    def test_small_chunks(self):
        # Force internal file size detection to be smaller than the